Just a quick heads up, the UK has passed revamped Bribery Act and there is a new wrinkle. It has extra-territorial provisions.
So if you work for a firms that are registered in the UK – you need to be aware of the implications. This article also provides a good overview of what to do.
Now for my US readers – this UK law is very similar to the Foreign Corrupt Practices Act – so the same approaches that you use to comply with that law (from a HR perspective) apply here to.